Amkor Technology, Inc.
MX ˙ BMV ˙ US0316521006
SecurityMX:AMKR / Amkor Technology, Inc.
InstitutionAqr Capital Management Llc
ManagerCliff Asness
Latest Disclosed Ownership3,242,130 shares
Latest Disclosed Value $ 141,421,703
Aqr Capital Management Llc reports 1.75% decrease in ownership of AMKR / Amkor Technology, Inc.

On May 15, 2026 - Aqr Capital Management Llc filed a 13F-HR form disclosing ownership of 3,242,130 shares of Amkor Technology, Inc. (MX:AMKR) valued at $141,421,703 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,299,975 shares of Amkor Technology, Inc.. This represents a change in shares of -1.75% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F AMKOR TECHNOLOGY COM 031652100 3,242,130 -57,845 -1.75 141,422 8.55 0.0120
2026-02-17 2025-12-31 13F AMKOR TECHNOLOGY COM 031652100 3,299,975 -911,554 -21.64 130,283 8.93 0.0683
2025-11-14 2025-09-30 13F AMKOR TECHNOLOGY COM 031652100 4,211,529 653,489 18.37 119,607 60.46 0.0767
2025-08-14 2025-06-30 13F AMKOR TECHNOLOGY COM 031652100 3,558,040 985,727 38.32 74,541 62.16 0.0617
2025-05-15 2025-03-31 13F AMKOR TECHNOLOGY COM 031652100 2,572,313 757,956 41.78 45,967 -1.38 0.0474
2025-02-14 2024-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,814,357 -680,963 -27.29 46,611 -38.96 0.0600
2024-11-14 2024-09-30 13F AMKOR TECHNOLOGY COM 031652100 2,495,320 708,851 39.68 76,357 6.80 0.1054
2024-08-14 2024-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,786,469 -127,426 -6.66 71,494 15.87 0.1096
2024-05-15 2024-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,913,895 -509,474 -21.02 61,704 -23.47 0.1051
2024-02-14 2023-12-31 13F AMKOR TECHNOLOGY COM 031652100 2,423,369 483,786 24.94 80,625 83.93 0.1518
2023-11-14 2023-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,939,583 547,604 39.34 43,835 5.85 0.0905
2023-08-14 2023-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,391,979 122,114 9.62 41,411 26.40 0.0880
2023-05-15 2023-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,269,865 -113,209 -8.19 32,763 0.33 0.0719
2023-02-14 2022-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,383,074 -673,308 -32.74 32,654 -4.97 0.0744
2022-11-14 2022-09-30 13F AMKOR TECHNOLOGY COM 031652100 2,056,382 -898,172 -30.40 34,362 -30.32 0.0838
2022-08-15 2022-06-30 13F AMKOR TECHNOLOGY COM 031652100 2,954,554 656,355 28.56 49,312 -1.21 0.1114
2022-05-16 2022-03-31 13F AMKOR TECHNOLOGY COM 031652100 2,298,199 879,097 61.95 49,917 41.89 0.0947
2022-02-14 2021-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,419,102 326,029 29.83 35,180 29.00 0.0638
2021-11-15 2021-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,093,073 346,227 46.36 27,272 54.27 0.0506
2021-08-16 2021-06-30 13F AMKOR TECHNOLOGY COM 031652100 746,846 487,375 187.83 17,678 187.35 0.0306
2021-05-17 2021-03-31 13F AMKOR TECHNOLOGY COM 031652100 259,471 -199,678 -43.49 6,152 -11.15 0.0101
2021-02-16 2020-12-31 13F AMKOR TECHNOLOGY COM 031652100 459,149 -168,407 -26.84 6,924 -1.49 0.0123
2020-11-16 2020-09-30 13F AMKOR TECHNOLOGY COM 031652100 627,556 -223,034 -26.22 7,029 -32.87 0.0119
2020-08-17 2020-06-30 13F AMKOR TECHNOLOGY COM 031652100 850,590 -117,162 -12.11 10,471 38.89 0.0169
2020-05-15 2020-03-31 13F AMKOR TECHNOLOGY COM 031652100 967,752 -376,281 -28.00 7,539 -56.85 0.0127
2020-02-14 2019-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,344,033 22,317 1.69 17,472 45.26 0.0199
2019-11-14 2019-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,321,716 289,568 28.05 12,028 56.21 0.0142
2019-08-14 2019-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,032,148 94,790 10.11 7,700 -3.81 0.0086
2019-05-14 2019-03-31 13F AMKOR TECHNOLOGY COM 031652100 937,358 206,747 28.30 8,005 67.01 0.0085
2019-02-14 2018-12-31 13F AMKOR TECHNOLOGY COM 031652100 730,611 -27,586 -3.64 4,793 -14.46 0.0056
2018-11-15 2018-09-30 13F/A-1 AMKOR TECHNOLOGY COM 031652100 758,197 -249,572 -24.76 5,603 -35.28 0.0054
2018-11-14 2018-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,007,769 0 8,657
2018-08-14 2018-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,007,769 -117,316 -10.43 8,657 -24.04 0.0087
2018-05-15 2018-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,125,085 -97,619 -7.98 11,397 -7.26 0.0123
2018-02-14 2017-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,222,704 52,069 4.45 12,289 -0.49 0.0129
2017-11-14 2017-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,170,635 -408,610 -25.87 12,350 -19.96 0.0147
2017-08-14 2017-06-30 13F AMKOR TECHNOLOGY COM 031652100 1,579,245 272,669 20.87 15,429 1.89 0.0204
2017-05-15 2017-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,306,576 185,738 16.57 15,143 28.06 0.0201
2017-02-14 2016-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,120,838 -140,347 -11.13 11,825 -3.54 0.0163
2016-11-14 2016-09-30 13F AMKOR TECHNOLOGY COM 031652100 1,261,185 527,598 71.92 12,259 190.64 0.0188
2016-08-15 2016-06-30 13F AMKOR TECHNOLOGY COM 031652100 733,587 -273,854 -27.18 4,218 -28.92 0.0074
2016-07-29 2016-03-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 1,007,441 289,763 40.38 5,934 36.01 0.0107
2016-05-16 2016-03-31 13F AMKOR TECHNOLOGY COM 031652100 924,148 5,444
2016-02-16 2015-12-31 13F AMKOR TECHNOLOGY COM 031652100 717,678 237,105 49.34 4,363 102.18 0.0076
2015-11-16 2015-09-30 13F AMKOR TECHNOLOGY COM 031652100 480,573 -197,984 -29.18 2,158 -46.81 0.0043
2015-08-14 2015-06-30 13F AMKOR TECHNOLOGY COM 031652100 678,557 -344,333 -33.66 4,057 -55.11 0.0080
2015-05-15 2015-03-31 13F AMKOR TECHNOLOGY COM 031652100 1,022,890 7,742 0.76 9,037 25.37 0.0207
2015-04-22 2014-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 1,015,148 169,953 20.11 7,208 1.41 0.0151
2015-02-17 2014-12-31 13F AMKOR TECHNOLOGY COM 031652100 1,015,148 7,208
2014-11-14 2014-09-30 13F AMKOR TECHNOLOGY COM 031652100 845,195 -5,939,185 -87.54 7,108 -90.63 0.0195
2014-08-14 2014-06-30 13F AMKOR TECHNOLOGY COM 031652100 6,784,380 6,718,185 10,149.08 75,849 16,606.83 0.2044
2014-05-15 2014-03-31 13F AMKOR TECHNOLOGY COM 031652100 66,195 2,573 4.04 454 16.41 0.0014
2014-02-14 2013-12-31 13F AMKOR TECHNOLOGY COM 031652100 63,622 -164,472 -72.11 390 -60.16 0.0012
2013-11-14 2013-09-30 13F AMKOR TECHNOLOGY COM 031652100 228,094 0 0.00 979 1.98 0.0035
2013-08-14 2013-06-30 13F AMKOR TECHNOLOGY COM 031652100 228,094 128,115 128.14 960 125.88 0.0034
2013-05-29 2012-12-31 13F/A-1 AMKOR TECHNOLOGY COM 031652100 99,979 99,979 425 0.0018
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.